Viconics VZ8250 User manual

VT8000 Room Controllers
VZ8250 Installation Guide
Variable Air Volume (VAV) Unit
Version 2

TABLE OF CONTENTS
1. SAFETY INFORMATION ................................................................................................................................ 3
2. INSTALLATION .............................................................................................................................................. 6
3. TYPICAL APPLICATION: PRESSURE INDEPENDENT (NO FAN).................................................................. 7
4. TYPICAL APPLICATION: PRESSURE INDEPENDENT (PARALLEL FAN)...................................................... 8
5. TYPICAL APPLICATION: PRESSURE DEPENDENT (NO FAN) ..................................................................... 9
6. TERMINAL IDENTIFICATION ...................................................................................................................... 10
7. HOME SCREEN DISPLAY ........................................................................................................................... 13
8. HOW TO ENTER SET-UP SCREEN.............................................................................................................. 14
9. SET-UP SCREEN DISPLAY .......................................................................................................................... 14
10. BALANCING................................................................................................................................................ 15
APPENDIX A. DEPLOYMENT ......................................................................................................................... 21

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VZ8250 [ Installation Guide ]
1. SAFETY INFORMATION
1.1 IMPORTANT INFORMATION
Read these instructions carefully and look at the equipment to become familiar with the device before trying to install, operate, service
or maintain it. The following special messages may appear throughout this bulletin or on the equipment to warn of potential hazards or
to call attention to information that clarifies or simplifies a procedure.
The addition of either symbol to a “Danger” or “Warning” safety label indicates that an electrical hazard exists which will result
in personal injury if the instructions are not followed.
This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow
this symbol to avoid possible injury or death.
DANGER
DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.
WARNING
WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION
CAUTION indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
NOTICE
NOTICE is used to address practices not related to physical injury. The safety alert symbol shall not be used with this signal word.
1.2 PLEASE NOTE
Electrical equipment should be installed, operated, serviced, and maintained only by qualified personnel. No responsibility is
assumed by Viconics Technologies for any consequences arising out of the use of this material.
A qualified person is one who has skills and knowledge related to the construction, installation, and operation of electrical equipment
and has received safety training to recognize and avoid the hazards involved.

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VZ8250 [ Installation Guide ]
1.3 BEFORE YOU BEGIN
LOSS OF CONTROL
WARNING
LOSS OF CONTROL
• The designer of any control scheme must consider the potential failure modes of control paths and, for certain critical control
functions, provide a means to achieve a safe state during and after a path failure. Examples of critical control functions are
emergency stop and over travel stop.
• Separate or redundant control paths must be provided for critical control functions.
• System control paths may include communication links. Consideration must be given to the implications of anticipated
transmission delays or failures of the link.1
• Each implementation of equipment utilizing communication links must be individually and thoroughly tested for proper
operation before being placed into service.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
CALIFORNIA PROPOSITION 65
WARNING
CALIFORNIA PROPOSITION 65
This product can expose you to chemicals including Lead and Bisphenol A (BPA), which are known to the State of California to
cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
Failure to follow these instructions can result in birth defects or other reproductive harm.
ELECTROSTATIC DISCHARGE
NOTICE
STATIC SENSITIVE COMPONENTS
Circuit boards and option cards can be damaged by static electricity. Observe the electrostatic precautions below when handling
controller circuit boards or testing components.
Failure to follow these instructions can result in equipment damage.
Observe the following precautions for handling static-sensitive components:
• Keep static-producing material such as plastic, upholstery, and carpeting out of the immediate work area.
• Store static-sensitive components in protective packaging when they are not installed in the drive.
• When handling a static-sensitive component, wear a conductive wrist strap connected to the component or drive through a
minimum of 1 megohm resistance.
• Avoid touching exposed conductors and components leads with skin or clothing.
1 For additional information about anticipated transmission delays or failures of the link, refer to NEMA ICS 1.1 (latest edition), Safety Guidelines for
the Application , Installation, and Maintenance of Solid State Control or its equivalent

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VZ8250 [ Installation Guide ]
INSTALLATION
NOTICE
INSTALLATION
• The system must be installed correctly by a qualified technician.
• If replacing an existing Room Controller, label wires before removal of Controller.
• Electronic controls are static sensitive devices. Discharge yourself correctly before manipulating and installing Room
Controller.
• A short circuit or wrong wiring may permanently damage Room Controller or equipment.
• All Room Controllers are designed for use as operating controls only and are not safety devices. Tampering with the devices or
unintended application of the devices will result in a void of warranty.
• This device must be installed to provide a separation distance of at least 8in (20cm) from all persons and must not be located
or operating in conjunction with any other antenna or transmitter.
• Refer to the Room Controller User Interface Guide for information on how to configure the Room Controller.
Failure to follow these instructions can result in equipment damage.
LOCATION
NOTICE
LOCATION
• Do not install on an exterior wall.
• Do not install behind a door.
• Do not install in areas with direct heat source.
• Do not install near any air discharge grill.
• Do not install in areas exposed to direct sunlight.
• Ensure Room Controller has sufficient natural air circulation.
• Ensure wall surface is flat and clean.
• Ensure external thermal sensor wirings are away from noisy electrical sources.
• Install 1.3 to 1.5 meter (52 to 60 inches) above the floor.
• Perform preventive maintenance on the damper and Variable Air Volume (VAV) box, according to the supplier documentation.
Failure to follow these instructions can result in equipment damage.
CLEANING THE ROOM CONTROLLER
NOTICE
CLEANING THE ROOM CONTROLLER
• Use a soft, pre-moistened lint-free cloth for cleaning.
• Avoid getting moisture in openings.
• Do not spray anything directly on the Room Controller or use compressed air.
• Do not use caustic/corrosive products, ammonia, solvents or any cleaning product containing alcohol or grit.
• Never use tools directly on the touchscreen.
• Never use paint on the Room Controller.
• Do not drop or crush the Room Controller, or allow it to come into contact with liquids.
• Do not use a damaged device (such as one with a cracked screen).
Failure to comply with these recommendations will result in damage to the unit and void the manufacturer’s warranty.

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Figure-1 Open the cover
Figure-3 Reinstall cover
Figure-2 Install the base
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VZ8250 [ Installation Guide ]
2. INSTALLATION
1. Remove the security screw (if applicable) from the bottom of the
Room Controller cover.
2. Open the unit by pulling on the bottom side of the Room
Controller (Figure 1).
3. Read the FCC ID and IC label installed inside the cover before
installing any wireless product.
4. Ensure the correct side of the base faces up.
5. Pull the cables 6in (15cm) out from wall.
6. Align the base and mark the location of the two mounting holes
on the wall.
7. Install the anchors in the wall (Figure 2).
8. Insert the cable in the central hole of the base.
9. Insert the screws in the mounting holes on each side of the
base.
10. Strip each wire 1/4in (0.6cm) from the end.
11. Insert each wire and screw according to the wiring chart (see
following pages).
12. Gently push excess wiring back into the hole.
13. Gently align the cover with the top of the base and snap it into
place from the bottom (Figure 3).
14. Install the security screw (if applicable).

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VZ8250 [ Installation Guide ]
3. TYPICAL APPLICATION: PRESSURE INDEPENDENT (NO FAN)
CHANGEOVER
SENSOR
Com.Sens.
SUPPLY AIR
TEMP. SENSOR
OPTIONAL
Com.Sens.
FLOW SENSOR
Com.RCOutput
13 14 15 16 17 18 19 20 21 22 23 24
BACnet + BACnet - BACnet REF UI16 UI17 Common
UI19 - CS
UI20 - RS C (Common) UI22 - SS UI23 UI24 - 0-10V Input
BO1 BO2 BO3
BO4 - Fan On
RC (24VAC)
C (Common)
RH
BO8 - Aux Heat
UO9 - Close Damp.
UO10 - Open Valve
UO11 - 0-10V Output UO12 - 0-10V Output
0-10V Analog Control
7 8 9 10 11 121 2 3 4 5 6
Spacer
BASEBOARD 24V~
24V Com.
0-10V ANALOG
HEATING COIL
Com.InputRC InputRC
0-10V ANALOG ACTUATOR
DAMPER
Com.
COMMON
24 VAC
FAN HI
FAN MED
FAN LO
Low-voltage
TERMINAL BLOCK
Configuration Parameter Name Configuration Settings
VAV box type PI
Actuator type 0-10V DA
Fan type None
Reheat conguration Duct + baseboard
Duct heater 0-10V DA
Baseboard conguration PWM VAC
Refer to the VZ8250 Application Guide for more information on the “Sequence of Operations and Wiring”.

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VZ8250 [ Installation Guide ]
4. TYPICAL APPLICATION: PRESSURE INDEPENDENT (PARALLEL FAN)
0-10V Analog Control + Parallel Fan
BO1 BO2 BO3
BO4 - Fan On
RC (24VAC)
C (Common)
RH
BO8 - Aux Heat
UO9 - Close Damp.
UO10 - Open Valve
UO11 - 0-10V Output UO12 - 0-10V Output
7 8 9 10 11 12
Spacer
CHANGEOVER
SENSOR
Com.Sens.
SUPPLY AIR
TEMP. SENSOR
OPTIONAL
Com.Sens.
FLOW SENSOR
Com.RCOutput
13 14 15 16 17 18 19 20 21 22 23 24
BACnet + BACnet - BACnet REF UI16 UI17 Common
UI19 - CS
UI20 - RS C (Common) UI22 - SS UI23 UI24 - 0-10V Input
0-10V ANALOG
HEATING COIL BASEBOARD 24V~
24V Com.Com.InputRC InputRC
0-10V ANALOG ACTUATOR
DAMPER
Com.
COMMON
24 VAC
FAN HI
FAN MED
FAN LO
Low-voltage
TERMINAL BLOCK
PARALLEL
FAN
Com.Enable
1 2 3 4 5 6
Configuration Parameter Name Configuration Settings
VAV box type PI
Actuator type 0-10V DA
Fan type Parallel binary
Reheat conguration Duct + baseboard
Duct heater 0-10V DA
Baseboard conguration PWM VAC
Refer to the VZ8250 Application Guide for more information on the “Sequence of Operations and Wiring”.

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VZ8250 [ Installation Guide ]
5. TYPICAL APPLICATION: PRESSURE DEPENDENT (NO FAN)
BO1 BO2 BO3
BO4 - Fan On
RC (24VAC)
C (Common)
RH
BO8 - Aux Heat
UO9 - Close Damp.
UO10 - Open Valve
UO11 - Open Damp.
UO12 - Close Valve
Floating Control
7 8 9 10 11 12
Spacer
CHANGEOVER
SENSOR
Com.Sens.
SUPPLY AIR
TEMP. SENSOR
OPTIONAL
Com.Sens.
COMMON
24 VAC
FAN HI
FAN MED
FAN LO
Low-voltage
TERMINAL BLOCK
13 14 15 16 17 18 19 20 21 22 23 24
BACnet + BACnet - BACnet REF UI16 UI17 Common
UI19 - CS
UI20 - RS C (Common) UI22 - SS UI23 UI24 - 0-10V Input
1 2 3 4 5 6
BASEBOARD 24V~
24V Com.
HEATING VALVE
Com.OpenClose OpenClose
FLOATING ACTUATOR
DAMPER
Com.
Configuration Parameter Name Configuration Settings
VAV box type PD
Actuator type Floating
Fan type None
Reheat conguration Duct + baseboard
Duct heater Floating
Baseboard conguration Valve NC (Normally Closed)
Refer to the VZ8250 Application Guide for more information on the “Sequence of Operations and Wiring”.

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VZ8250 [ Installation Guide ]
6. TERMINAL IDENTIFICATION
6.1 FAN TYPE
Supported fan types:
• Parallel On/Off
• Serial On/Off
• Parallel ECM
• Serial ECM
Supported output types:
• On/Off: Binary Output
• ECM: Analog Output
Binary (24V~)
Terminal Name Connection
4BO4 24V~ Enable
6, 18 or 21 C / 24 V~ Common 24 V~ Common
ECM (0-10V DC)*
Terminal Name Connection
6, 18 or 21 C / 24 V~ Common 24 V~ Common
10 UO10 0-10V Output
* Warning! Floating duct reheat is not possible when Fan Type is ECM.
6.2 AIR FLOW SENSOR (PI ONLY)
Supported air flow sensor parameters:
• Output voltage = 0-10V (DC)
• Pressure range = 0.5 or 5 inch water column
• Flow a 1 inch water column:
Minimum = 10
Maximum = 10000
NOTE: Refer to the VAV box manufacturer flow chart for the recommended settings.
Recommended air flow sensor: Schneider Electric (Veris) PX3PXX01 or equivalent.
PI-Only Air Flow Sensor
Terminal Name Connection
5RC / 24 V~ Hot 24 V~ Hot
6, 18 or 21 C / 24 V~ Common 24 V~ Common
24 UI24 0-10V Input